Oh, but if it ain't a Catholic you are...
4 seconds sound clip from the Anna Christie (1930) movie soundboard.
You can hear this line at 01:26:36 in the DVD version of the movie.
Quote context
[...]
- And may the blackest curse of God strike me if I'm lying.
- Oh, glory be to God, I'm after believing you now.
- No, why?
- Well, don't you believe me, Matt?
- Oh, but if it ain't a Catholic you are...
- I ain't nothing, Matt. What's the difference? Didn't you hear me swear?
- We'll be wedded this day. And we'll be happy, the two of us, in spite of the devil.
- Well, we gotta have a drink on this, my good man.
[...]